It’s always been true that weather visualisation systems have great difficulty in synchronising frontal systems and isobars. Sometime they have trouble synchronising rainfall layers on top of isobars like they seem to be having down at the BBC today. Never mind the average punter that’s watching from home will never notice, after all it’s only visible for a second or two. It looks like Matt Taylor has the rainfall rate layer from one model overlaid on the isobars from another, or it could be they’ve made a hash of free hand drawing the frontal systems. Maybe that’s because the models are in a state of flux and the story is changing from one of “getting milder” to one that’s “getting less-cold’ and they were in the process of swapping one model for another.